Hooked Manipulation Member Connection for Microcatheters
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Solution Overview
Problem
There is a need for endovascular intervention devices and manipulation members that have a small enough cross-sectional dimension to be introduced through small-diameter catheters, are more reliable, and fail in a desired mode, particularly for neurovascular interventions where catheters have inner diameters of 0.027 inch or smaller.
Innovation Solution
The development of a device for intravascular intervention comprising an elongate manipulation member with a hooked portion and a joining element, such as a band or binding agent, that permanently attaches to an intervention element, allowing for secure attachment while maintaining a small size to fit through microcatheters and ensuring reliable failure modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the connection between manipulation member and intervention device is made secure and reliable, then the attachment strength is improved, but the cross-sectional dimension increases making it difficult to pass through small-diameter catheters
Solution Approach 1:
The hooked portion of the manipulation member is inserted through the intervention element and nested within its structure, creating a secure connection without requiring a large cross-sectional profile. The hook engages with the intervention element from the inside, allowing the connection to fit through small-diameter catheters while maintaining attachment strength.
Solution Approach 2:
The connection mechanism is divided into separate functional segments: the hooked portion for engagement, the intervention element with its structural features, and the joining element for permanent attachment. This segmentation allows each component to be optimized independently, enabling a compact overall profile while achieving reliable connection through the combined action of multiple specialized parts.
2Reliability
If a permanent joining element is used to attach the manipulation member to the intervention device, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The joining element is integrated with the hooked portion and intervention element to form a unified permanent connection. The binding agent or welded structure merges the separate components into a single reliable attachment system, eliminating the need for additional complex fastening mechanisms while ensuring permanent attachment.
Solution Approach 2:
The mechanical connection is replaced or supplemented with a chemical bonding mechanism using UV-curable adhesive or other binding agents. This substitution creates a permanent bond without requiring complex mechanical interlocking structures, reducing overall device complexity while maintaining or enhancing connection reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables secure attachment and reliable operation of endovascular devices within small-diameter catheters, ensuring effective intravascular interventions by maintaining structural integrity and preventing unintended separation during use.
Implementation Method 1
The binding agent is a UV curable adhesive
Data Source
AI summary
A device for intravascular intervention can comprise an intervention element, an elongate manipulation member, and a joining element. The elongate element can comprise a hooked portion extending about a proximal portion of the intervention element. The hooked portion can comprise a bend. The hooked portion can have (i) no substantial surface crack at an interior region of the bend and (ii) a maximum lateral dimension that is less than 0.027 inch. The joining element can substantially permanently attach the hooked portion to the intervention element.